Paramore have vowed to continue despite losing two of their founding members.

Lead guitarist Josh Farro and his younger brother Zac, who played drums, decided to leave the Grammy-nominated band after their Orlando gig last weekend.

"A couple of months ago, Josh and Zac let us know they would be leaving the band after our show in Orlando - none of us were really shocked," frontwoman Hayley Williams posted on the group's official website.

"For the last year it hasn't seemed as if they wanted to be around any more. We want Josh and Zac to do something that makes them happy and if that isn't here with us, then we support them finding happiness elsewhere. But we never for a second thought about leaving any of this behind."

Hayley admitted their rise to fame has not been "without trial" but has been "intense and incredible".

"We really hope that you can be encouraged by the fact that the three of us who are still here are ready to take on another chapter of our journey together," she continued.

"You have always been what keeps us going so why would we stop now? We want to stick by you. Knowing that we have a unified passion and a clear vision makes us feel stronger than ever."

She added: "We have some amazing things lined up for next year starting with our tour in South America."